It is hardly a coincidence that so many of us contract virus infections in the course of the winter. It is because we lack vitamin D, which we are unable to synthesize when the sun sits too low in the sky. Danish scientists have discovered how vitamin D activates the immune system, and a comprehensive meta-analysis shows how vitamin D supplements can prevent colds, flus, and related complications.

During the winter period, many of us have runny noses and some may end up in bed with a bout of flu. Now is the time to prime your immune system by getting all those vitamins and minerals that your diet is not always able to provide you. That way you can ward off germs and avoid unnecessary sick days. But what effect does vitamin C, vitamin D, selenium, and zinc have on the immune system’s different “troops”, and how much do we need?

Clostridium difficile is a bacterium that causes diarrhea and intestinal infection. The infection may even be life-threatening. A new American study that is published in PLoS Pathogens shows that this bacterium can only thrive with an overload of calcium in the intestinal system. Such a calcium excess can be caused by overconsumption of calcium, lack of vitamin D, and regular use of antacids.

Researchers from Sweden and England have discovered a link between vitamin A and diabetes. According to their new study, vitamin A is essential for enabling pancreatic beta cells to produce insulin, the hormone that helps cells take up sugar. This discovery could open new doors to better diabetes therapies in the future. However, it is also important to focus on diet, weight management, and the intake of other nutrients like chromium for proper blood sugar control, which is necessary for preventing and treating diabetes.

- that are a threat to public health

Climate changes and soil depletion increase the risk of selenium deficiency, especially in Europe as shown by Swiss scientists. Selenium is an essential nutrient, and existing studies clearly show that low selenium intake increases the risk of cancer, metabolic disorders, impaired immunity, poor sperm quality, and atherosclerosis. Selenium deficiencies are therefore to be taken seriously and should be prevented one way or another. A good way to get enough of the nutrient is by taking a high-quality selenium supplement.

Despite official recommendations to give infants a daily vitamin D supplement, nearly 50% of parents forget to follow this advice according to a large new Danish study. Not only do the children risk weak bones, it also increases their risk of infections and autism, other studies suggest.

It is common knowledge that omega-3 fatty acids are vital for our brain development and nervous system. Now, researchers from Harvard Medical School in the United States have discovered that they also play an important role in maintaining the blood-brain barrier that protects the central nervous system against bacteria and toxins.